Improvement in paint-vehicles



UNITED STATES PATENT OFFICE.

ISAAC GAITMAN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIM- SELF, J.BREINIG, AND D. E. BREINIG.

IMPROVEMENT IN PAINT-VEHICLES.

Specification forming part of Letters Patent No. 18,794, dated December1, 1857.

To all whom it may concern:

Be it known that I, ISAAC GATTMAN, of the city of Philadelphia, andState of Pennsylvania, have invented a new and useful Composition forThinning Paints; and I do hereby declare that the following is a fulland complete description of the same.

Myinvention consists in the employment, as asubstituteforoilinthinningpaints,ofasolution of the alkaline salts ofthe fatty acids, (oleate, margarate, stearate of potash, soda, and likesubstances,) in order that paints thus thinned may spread easier, coverbetter, dry quicker, be free from all cracks when dry, and much cheaperthan paints thinned with oil.

In order to enable others skilled in the art to make and use myinvention, I will now proceed to describe how the same may be carriedinto effect.

I first prepare a caustic lye of either potash or soda of 1.043 specificgravity, or 6 according to the hydrometer of Baum, and to every threegallons of that lye I take five pounds of tallow, soap, fat, lard, oroil, and boil until a clear solution of uniform consistency is obtained.I now add while boiling a sufficient quantity of chloride of sodium toseparate the alkaline salts of the fatty acids, strain off the lye asmuch as possible, and to every twentyto the paint more body, andtherefore will cover better. By then applying the last coat in the usualwav the paint will have the appearance of a goo substantial oil-paint,and yet will be cheaper and better, wear longer, will dry quicker thanordinary oil-paint without the introduction of artificial driers orsiccatives, which universally change the appearance of paints. a

For making what painters call China gloss my preparation is especiallyadapted on account of its tenacity, which allows it to yield to thevarnish, and thus the cracking so common to ordinary varnishedoil-paints is avoided.

In some cases the addition of rosin to the fats or oils, when boiled inthe caustic lye, may be advantageous, but particular care must be takento have the oleate predominating in the compound.

It will be observed that I am enabled to use connnon fish or otherundrying oils, as well as dryiug-oil-a circumstance which considerablyreduces the expense of the paint.

I do not claim exclusively the use of watery solutions for mixingpaints; but

What Ido claim, and desire to secure by Letters Patent, is-- Theemployment of the alkaline salts of the fatty acids, (oleate, margarate,stearate of potash, soda, and like substances,) in combination withrosin and oil, as a thinner for paints, instead of oil, substantially inthe manner herein set forth, and for the purpose specified.

In testimony whereofI have signed my name to this specification beforetn 0 subscribing \vitnesses.

ISAAC GATTMAN.

Witnesses:

HENRY HowsoN,

WILLIAM E. WALTON.

